﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Eagle:birds
    {
        public void bb1() 
        {
            Console.WriteLine("我有羽毛！！！");
        }
        public virtual void bb()
        {
            base.roar();
            Console.WriteLine("嘤嘤嘤！！！");
        }
    }
}
